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Cassini Titan Flyby in October 2004News story originally written on October 28, 2004

The robotic Cassini spacecraft flew by
Saturn's moon Titan on October 26, 2004.
Titan is Saturn's largest moon, and has the thickest atmosphere of any
moon in our Solar System.

Cassini captured what are by far the best images of Titan to date. The images
show regions of dark and bright materials that may indicate a surface shaped
by
multiple
geologic processes, but scientists are not yet certain what to make of
the patterns observed. An assortment
of ten instruments on Cassini recorded data about Titan during the flyby.
One detected unusual proportions of nitrogen isotopes in Titan's atmosphere,
possibly providing clues about the "age" of that atmosphere. Another instruments,
the ion and neutral mass spectrometer, detected a diversity of hydrocarbons
(including benzene and
diacetylene) in the moon's upper atmosphere.

Cassini
passed
within 1,174
kilometers (730 miles) of the Titan during this close encounter. Cassini,
which is in orbit around Saturn, will fly
past Titan 44 more times in the next four years!

The Huygens lander, which is currently riding piggyback on Cassini, will detach
from the "mothership" and drop to a landing
on Titan in January 2005. Some
of
the measurements
of Titan's
atmosphere that Cassini made on this flyby will help scientists better
characterize the moon's atmosphere. The more scientists know about Titan's
atmosphere, the safer they can make Huygens'
entry into and flight through that atmosphere.

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